[services] Tests - Blob - Add test logic

Summary:
Depends on D4276

Adding test logic for the blob test. This code invoked methods introduced in D4274 D4275 and D4276.

Test Plan:

cd services
yarn run-integration-tests blob

Reviewers: palys-swm, varun

Reviewed By: palys-swm, varun

Subscribers: ashoat, palys-swm, Adrian, atul, yayabosh

Differential Revision: https://phab.comm.dev/D4277